8422405 has 4 divisors (see below), whose sum is σ = 10106892. Its totient is φ = 6737920.

The previous prime is 8422399. The next prime is 8422411. The reversal of 8422405 is 5042248.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (8422399) and next prime (8422411).

It can be written as a sum of positive squares in 2 ways, for example, as 4418404 + 4004001 = 2102^2 + 2001^2 .

It is not a de Polignac number, because 8422405 - 2¹³ = 8414213 is a prime.

It is a d-powerful number, because it can be written as 8³ + 4⁴ + 2¹⁵ + 2²³ + 4⁴ + 0 + 5 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8422405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842236 + ... + 842245.

It is an arithmetic number, because the mean of its divisors is an integer number (2526723).

Almost surely, 2^8422405 is an apocalyptic number.

It is an amenable number.

8422405 is a deficient number, since it is larger than the sum of its proper divisors (1684487).

8422405 is a wasteful number, since it uses less digits than its factorization.

8422405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684486.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 8422405 is about 2902.1380049887. The cubic root of 8422405 is about 203.4598439321.

The spelling of 8422405 in words is "eight million, four hundred twenty-two thousand, four hundred five".